cleanup: remove unused property from computed watchlist

Author: lukasnys

addon/-private/collapse-tree.js

@@ -45,24 +45,20 @@ export const TableRowMeta = EmberObject.extend({
   }),
 
   // eslint-disable-next-line ember/use-brace-expansion
-  isSelected: computed(
-    '_tree.{selection.[],selectionMatchFunction}',
-    '_parentMeta.isSelected',
-    function() {
-      let rowValue = get(this, '_rowValue');
-      let selection = get(this, '_tree.selection');
-      let selectionMatchFunction = get(this, '_tree.selectionMatchFunction');
-
-      if (isArray(selection)) {
-        return this.get('isGroupSelected');
-      }
+  isSelected: computed('_tree.{selection.[],selectionMatchFunction}', function() {
+    let rowValue = get(this, '_rowValue');
+    let selection = get(this, '_tree.selection');
+    let selectionMatchFunction = get(this, '_tree.selectionMatchFunction');
 
-      let isRowSelection = selectionMatchFunction
-        ? selectionMatchFunction(selection, rowValue)
-        : selection === rowValue;
-      return isRowSelection || get(this, '_parentMeta.isSelected');
+    if (isArray(selection)) {
+      return this.get('isGroupSelected');
     }
-  ),
+
+    let isRowSelection = selectionMatchFunction
+      ? selectionMatchFunction(selection, rowValue)
+      : selection === rowValue;
+    return isRowSelection || get(this, '_parentMeta.isSelected');
+  }),
 
   isGroupSelected: computed(
     '_tree.{selection.[],selectionMatchFunction}',